In one of this composer's works a theme played by the glockenspiels and marimbas is juxtaposed against an organ and women's chorus who only sing the sound "ee" and play gradually lengthening chord cadences. Daniel Hamm is quoted in a work commemorating six boys who were convicted of murder during the Harlem race riots, and Beryl Knot wrote the libretto of an opera featuring the songs "Who is Hagar?" and "Who is Ishmael" that is titled The Cave. He pioneered a technique where the same musical segment is played on two different instruments at different tempos called "phasing," which is featured in his pieces Come Out, It's Gonna Rain, and Drumming. One of his works features sections called "Pulses," while he featured his governess Virginia Davis in a movement called "America-Before the War," which is part of a string quartet that uses tape recordings of interview with Holocaust survivors. For 10 points, name this 
In one of this composer's works a theme played by the glockenspiels and marimbas is juxtaposed against an organ and women's chorus who only sing the sound "ee" and play gradually lengthening chord cadences. Daniel Hamm is quoted in a work commemorating six boys who were convicted of murder during the Harlem race riots, and Beryl Knot wrote the libretto of an opera featuring the songs "Who is Hagar?" and "Who is Ishmael" that is titled The Cave. He pioneered a technique where the same musical segment is played on two different instruments at different tempos called "phasing," which is featured in his pieces Come Out, It's Gonna Rain, and Drumming. One of his works features sections called "Pulses," while he featured his governess Virginia Davis in a movement called "America-Before the War," which is part of a string quartet that uses tape recordings of interview with Holocaust survivors. For 10 points, name this minimalist composer who wrote Music for 18 Musicians and Different Trains.
In one of this composer's works a theme played by the glockenspiels and marimbas is juxtaposed against an organ and women's chorus who only sing the sound "ee" and play gradually lengthening chord cadences.
Steve {Reich}